Art of treating metal and other tubes or rods.



E; T. GREENPIELD.

ART OF TREATING METAL AND OTHER TUBES 0R RODS.

APPLICATION FILED JULY 17, 1909.

Patented Jan.25, 1910.

4 SHEETS-SHEET l.

.; z'azessesx Patented Jan. 25 1910.

E. T. GEEENFIELD.

F TREATING METAL AND OTHER TUBES 0R RODS APPLICATION FILED JULY 17, 1909.

ART 0 E. T. GREENPIELD. ART OP TREATING METAL AND OTHER TUBES OR RODS.

APPLICATION mun) JULY 17 909.

Patented Jan.25, 1910.

4 sums-sunny.

E. T GREENFIELD.

ART OF TREATING METAL AND OTHER TUBES OR RODS.

AIPLIOATION FILED JULY 17, 1909.

Patented Jan; 25, 1910 QQ'FAEQ,

Wimwssesx Uh ME T. GREENFIELD, F 'KZIAM'ESHA, NEW YGRK.

ART 0F TREATING METAL AND QTE'ER QUIBE$ 0B READS.

Original application fi led March 25, 1909, Sexist No. 485,735.

- 1909. Serialjtlo. 508,133.

f0 all whom it may concern:

Specification of Eetters'Petent.

Be it known that I, Enwn; TL'GREEXklELU, a citizen of the United States, and resident I of Kiamcsha, county of ttlullivan, and State other Tubes or Rods, of which the following is a specification novel method of treating metal tubes or rods with liquid coatings and it has for its obiects, first, to eliiect such coating automatically and with great speed; second, to effect the interior coating of tubes of this nature friction or resistance to the How of gas,

iil'New York, have made a new and useful Invention in the Art of Treating Metal and Mvinvention is directed particularly to a t in such manner as to give a smooth lining" thereto which will afford little or'no skin water, or other liquids; third, to provide.

novel means for effectually drying and seat- ;-ing the treating liquid as applied by my ,uovel method to tubes or rods.

.For a full and clear understanding of my invention, such as will enable others skilled in the art to practice-the method hereinafter described and claimed, reference is had to the accompanying drawings which illustrate my novel mechanism by which such method is eti'ected and in which Sheets 1, 2v and 3 should be placed end to end. with Sheet 1 upon the left of-Sheet 2 and Sheet 2 upon the left of Sheet 3.

Figure 1 of the drawings represents a side elevational view of that portion ofthe apparatus in which the tubes or rods to be treated are" first heated to the desired temperature and theii t ed forward to the treating oath, one end of the heater being shown in broken sectional view t'or thepurpose of illustrating the interior structure trating that porTion of the apparatus through which the tubes or rods are tot-hi treating hath. Fig.2 is u plan View of Fig. 1 as seen looking thcrcat from the top toward the bottom of the drawing. 3 is a transverse sectional view taken through Fig. 2 on the line l'lx and as seen looking Patented Jean. 2'5, @Qdd.

Divided and this application filed Ju e? 17,

medium heated; the hinged top ofthetreating'chamher being shown in open position, one of the tubesbeing treated and fed ,forward and in two different 'xositions, as shown in full lines and dotted lines; a. P9P $9 tion of the mechanism by which the tubes are successively wiped, both will 'iorly :and interior-1y, and fed forward after treatment, being shown on the right hand end of said figure. Fig. 5 is a-part plan, part longitn- M diua'l sectional view of the mechanism sl'iowu in Fig. 72, the sectional view -.being taken tln'ough the treating chanihernlone. Fig. 6 is a further sectional view on the line Z-Z Fig. 7, illustrating the coi'itinuation of that 4 portion of the wiping and feeding .lnechunism shown on the right of .Fig. 4. l ig. I a plan view of Fig.4 Fig. 8 is a part horizontal sectional and part plan view on an enlarg wd scale of that portion of the uppa- ,75

' line TY-Y and as seen lookingthereatd'it'om 'gr'eatest possible speed,

thereof,

the dotted lines on the-extreme right illusp the like.

successively fed 3 left to right in thedirection ot' the arrows.

My invention is particularly designed to etfect a treatment of metal tubes by sub- 'jecting the same to a heated bath of some liquid which will effectually coat the same both exteriorly and interiorly, and with-the and will subsequently wipe and polish the same; the entire mechanism being preferably automatic in its operation and so'arran ed that such tubes are first/subjected to sul'iicient heat to seat or set the coating as they are advanced through a treating bath. which :bath is in turn subjected to heat from a furnace or The tubes are then autoi'natically advanced in sequence and successively wi both exteriorly and interiorly While still, oti

i the exterior wiping being effected by means "Fig. l

being subsequently thereat from left to right in the direction of" l the arrows, the top or inclosing door being lines and in open position in dotted lines. Fig. 4 is a part tional view on the line,Z-Z li igs. 5 and 7) ofzthat portion of thecoating eti'ected-and the liquid coating the-treating bath by w ich 5 a ternary to treat metal tubes, such as 112011 or 1 shown in this figure-in closed position in full in the nature of a stationary wiper of proper softness and fiexibility, the interior wiping effected through the agency of what 1 term a floating wiper which is-so devised that as the tubes are successively fed forward the interior is given i a polished surface which. will be racticallty side elevational, part sec-f as frictionless as that of ,porce ain lined E tubes.

by immersing such tubes in a bath of molten best resu tsr in all,0f which like numerals of reference zinc, tin, and like liquids, and then removing the same from the bath and successively wiping them first on the exterior surface,

and subsequently, interiorly. Such methods are slow and unsatisfactory and the tubes cool too ui'ekl after the'bathto obtain they novel method of treating metal tubes in the manner hereinafter describedgives marked improved results over such old methods, in that I am enabled to avoid practically all loss of heat units from the time that the tube enters, passes through, and.leaves.the bath until it 'is elfectually wiped,,both exteriorly and interiorly. 'An imfportant step-in my novel method is that. 0 are immersed in the heated liquid bath. I have ascertained that in the practice of well known methods heretofore used in galvanizing or treating metal tubes in a heated liquid bath, it usually requires about three minutes to properly heat, the tubes before the liquid galvanizing agent takes effect, so that when tubes of this nature .are' sufficiently heated before they enter the bath they are caused to be galvanized Ortreated during the time that they are passing therethrough and without being stopped, thus permitting of a continuousror successive feed of such tubes through the bath. I

" Referring now to the drawings in detail,

represent like parts, and first to Figs. 1 to 3 (Sheet 1) 1 represents a frame or structure embodying a series of inclined members supported by vertical standards, as shown,

and carrying in turn a floor 2 uponwhich is supported a metal heating chamber 3 provided with a pivoted door 4 at its top. This chamber is of the desired length nd capacity to subject the tubes 5 to be treated to the usual preliminary necessary heat before advancing the same to the treating bath.

6 represents a'tube connected with a source offuel supply as gas, and 7, 7, are 2W0 branches entering at the bottom of the h ,ating chamber 3 and extending the entire length thereof. 8, 8 are vertically disposed tubes extending therefrom upward within the inner walls of the chamber, there beiilg four such sets of tubes which are provided with gas-jets or openings 9. 9, 9. 10, 10, 10

represent a' series of rolls utilized generallythropghout the apparatus for reducing the friction in the movement of the tubes as they are successively advanced, it being ap- E parent that the chamber 3 1s open longitudinally at its bottom so that theset'ubes While being heated rest the first one upon the friction rolls and-each successive tube upon the top of the other.

Referring now to Figs- 4 and?) (Sheet 2) and in connection therewith to that portion first heating the tubes before they of Fig. "1 illustrated in dotted lines on the right thereof, 12 represents the brick work of a furnace strength to support upon its top a liquid containing treating chamber 13, said chamberbeing preferably of box, form and of metal or such other material as will with standthe relati'vely' great heat offthe'furnace. 14 represents the pivoted lid or cover open position for permitting of the examination of the treatingbath.v 15 representsa throat atone end of the treating chamber for aiding in the movement of the tubes for properly focusing the ends thereof as they are successively advanced through the cham her and to the wiping mechanism exterior thereto. furnaceand 17 the chimney for conveying away the products -of combustion. This heating chamber may be heated by steam, gas, or any other source of heat, having-'suf-' cient capacity to heat the liquid treating agent to the desiredteinperature. cone-shaped throat for guiding the tubes into the'treating bath and 19 represents a. similar throat located near the center thereof. 20 20 represent, wherever used throu' houtthe drawings, pairs-of grooved feeding rolls located in alinement with each other and in direct alinement with all of the tubes 5, as they are being fed from the primary heating chamber 3, Fig. 1, there being shown six such pairs of rolls interconnected by gearing and sprocket wheels and chains, as clearly illustrated in Figs. 5 and 7, that'pair on the left of Fig. 5 being operativel connected with a shaft carrying a pul ey' 21 which is connected in'turn by a belt 22 with adriving source of energy, as an electric motor 23. It will also be understood that each pair of feeding rolls is provided with the necessary yielding adjusting means for varying the feed pressure between the rolls and tubes 5, so as to, give the desired tractive effect upon the tubes, such adjustable means being shown on one pair of the rolls at the extreme left of Figs. 4 and 5. 24 shown at sents a flexible wiper having the sameinterior conformation as the e'xteriorconformation of the tube or rod to be wiped; such 25 detachable from the chamber 13. through the agency of screws or bolts.

Referring now to Figs. 6 and 7 (Sheet 3) and to the extreme right hand portion of 1 similar in a general way to the floor 2 and secured to the extreme right hand end of the treating chamber 13, so" that its upper surface is inclined as shown and practically 1n I vertical alinement with the outlet of the throat- 15. said floor being sustained at its of proper dimensions andof such chamber, shown in this figure es in the extreme right hand end of Fig. 4 reprer,

Figs. 4- and 5 (Sheet 2) 26 represents a floor 16, 16 represent the doors of the f 18-is a wiper being secured in front of the outlet of the throat 15 by a tubular retalning collar and at the other at a shown and provided of holding devices outgr end by standards, as shown in Fig. 6. 27 is an extension of this floor in the nature of a chute preferably curvilinear in cross section and having an inclination the reverse of that of the floor 26. 28 represents an additional floor secured at one end directly to the top of the brick work of the furnace 12 point near theouter end of the chute 27. The material ofthis floor 26, 27 and side walls, not shown but secured thereto, is preferably of iron for the purpose of constituting a heat retaining chamber adapted to be sup lied with heat from the furnace 12 throng a pipe 11, the function of this chamber being to give additional heat for the purpose of further drying or curingthe tubes or rods as they are forced forward.

Referring to Figs. 8 and 9 (Sheet 4:) in connection with the description already had as to Figs. 4, 5, 6 and 7 I will describe the structural parts of the apparatus by which the tubes or rods are successively fed forward as they are treated and successively wiped or polished interiorly, the structural features of this apparatus being illustrated in detail in these figures of 'the drawings. 29, 29, 29, 29 represent two pairs of vertical standards secured directly to the floor 26, the distance between these two pairs of standards being somewhat greater than the lengths of the individual tubes or rods 5 to he treated. To these pairs of standards are slidably secured two pairs of internally corrugated clutching or holding devices 30, 30, adapted to be forced forward toward each other by strohg spiral springs 31, 31, 31, 31,

which springs are made adwstable throu h' the agency of screwthreaded adjusting evices 3-2, 32,}2, 32. 33 represents the supporting rod of the floating wiper, one end of which rod is icnlarged and corrugated as with a cone+shaped guiding point or head, the other end thereof being screw-threaded and adapted to be secured directly ,to an entirely similar corrugated and cone-shaped. end, said corrugated and cone-shaped ends being both represented by the'numeral 36. These corrugations correspond in turn with the likecorrugation's in lhe curvilinear opposite faces of the pairs 30. To the opposite ends of said holding devices are secured pair'so guide-rolls 37, 37, there being two such pairs at each end of the'floating wiper. 34, 34 represent respectively sectional tubular sleeves and 35. 35 wipers of soft or flexible material adapted to be threaded upon the the scales, 0115,

I temperature lhe desired rod 33 between the respective tubular secg yielding material which will give the desired interior surface polish or finish the tubes be ng treated. This rod 33 and attached arts are combined in the manner clearly illustrated in the drawings and cured in place normally with the curvilinear corrugated faces of the holding devices 30, firmly but yieldingly gripping or clamping the same in the manner shown on the left of Fig. 8 both ends of such rod being normally held as shown on the left when no tube is being fed forward. As illustrated-in Fig. 8, the incoming end of a tube 5 which has just been treated in the bath, is shown as a proaching the cone-shaped end 36 o? t e floating wiper and the retiring end of a pre- .cedingfltube is shown on the ri t as having been ireviously wiped exteriorly and V in: terior y and as it is being advanced onward toward the chute 27 through'the feeding rolls 2d, a

The manner of treating tubes with my novel invention will now be described, it bein understood that a proper quantity of the liquid bath with which the tubes are to be treated has been placed in the treating chamber, as for instance, a liquid embracing the usual materials constituting a bath for the so-called galvanizing of iron tubes, and that the same is kept heated to the desired by heati'tonl the furnace 12. number of tubes 5 having been ,pickled by treatment with a diof the proper character to remove and other extraneous substances, the same are placed in the heating chamber 3 and the gas having been ignited theythe tubes-are temperature to effect treatment in the bath. The motor 23 (Fig. 5) is then set in motion so as to effect the feed of the tubes through the agency of the interconnected sprocket chains and gear-wheels, in the direction shownby the arrows. The lowertube 5' is then, either manually or by like those numbered'izll, advanced over the rolls 10 until the outer right hand end thereof enters the first pair of feeding rolls on the left of Fig. 4. It is then immediately advanced in this heated condition into the heated bath in the treating chamber 13 and is again fed forward through the coneshaped throat 19 to the second set of feeding rolls 20, which rolls, it will be noted, are

previousl .luted aci heated to theproper driving, rolls I end of the chambcrto permit the rear end of the tube to drop by it is fully within said chamber, in the direction of the arrow. and into the position shown in dotted lines. It is aided further in this movement. in the event of its failure to drop by its own weight. by the inclination of the throat 15. As the tube advances and passes outward under the under side of the asbestos, or other cloth; or. in tact of any guide-rolls 10. 10 in the bath it is wiped exteriorly by the wiper 24, and

l end of the rod the cone-shaped 33 enters the inner end its own weight, whenthereof, While the outer surface passes between the ends of the guide-rolls 37 forcing the holding devices 30, 30 apart from each other to an extentequal to the diameter of the outer wall, thus liberating this .end of the rod' 33 fandf permitting the tube. to be advanced through thefirst pair of feeding rolls 20'on the right of the heating chamber.

As the tube isfurther advanced, therefore,

by this pair of feeding rolls and is released from the last pair of such rolls within the chamber, its inner surface is successively wiped or polished by the series of wipers 35, 35, and these wipers being of proper material and individually so constructed as to give the best possible p'olish to the inner surface of the tube, willact in accordance with suchconditions and completely wipe or polish the interior thereof, it being understood that the holding devices 30, 30 on the right for the rod 33 and its interconnected parts will be held in gripping mechanical connection with the corrugations on the end 36, so that during the timethat the holding devices 30, on.the extreme left hand'end are held apart and thewiping is being effected,

I said rod will be mechanically held at its right hand end, and that afterthe tube is advanced over the wipers and the lefthand end thereof released from the holding devices 30, 30 on the left, the right hand end of said tube will separatethe holding devices 30, 30 on the extreme right in the same manner as it separated the like devices on the extreme left. In the meantime the holding devices on the extreme left will" have been released as the left hand end of the tube passes frombetween them, so that now the floating rod and its attached parts will be held by the holding'devices on the extreme left. It is thus apparent that each pair of holding devices successively holds this float- I ing rodv and accon'ipanying parts as the tubes are being advanced. As the rod 5 is finally advanced under the pair of feeding rolls 20 at the extreme right of Fig. 8 and is again seized by the next pair of such rolls, the last pair of holding devices 30, 30 will assume theholding position shown by the pair-on the extreme left, thus holding-said floating rod and parts. Finally such tube passes outward in the direction of the arrows shown in Fig. 6 over the heating chamber which is heated from the furnace through the pipe 11 tained for the purpose of advancing the rods until finally delivered over that part the apparatus shown in Fig. 6. I do not limit my invention to the'detail's of construction illustrated in the accompanying drawings for practicing the method of treatment hereinbefore described, such inventionbeing directed generically to a method of treatment, regardless ofthe structural nature of the parts by which thisresult isattained. Nor do I limit myself to the treatment of tubes, as' obviously solid rods may be treated in this manner, or hollow tubes maybe simply treated externally and wiped in the manner described without applying the interior wiping treatment where-1t is desired to construct either tubes or rods having a polished exterior surface, it being apparent that in this instance the interior W1 ing mechanism illustrated in Figs. 8 and 9 o the drawings may be dispensed with, and in would be of especial utility; as, for instance,

' in cases where tubes or rods are being treated with various types of bronze paints or liquid surfacing agents to which it is desired to which event the exterior heating chamber give a finished appearance, my invention -being directed generically to a'method of treatting either tubes or rods in the manner described and fdr uses generally in the arts, the same having 'esoecial utility in treating tubes or rods with l acquering liquids; or, in all such uses where tubes or rods are treated with surfacing coatings.

I am aware that it is broadly old in. the

art of galvanizing iron or analogous wire to subject it 'to a bath bf molten metal and draw the same therefrom through one or more masses of flexible wiping material, such as cotton waste, asbestos, and the like, thus giving. to the wire a polished galvanized coating, and I make no claim hereinafter broad enough to include such methods, my invention being directed to the coating of ion ins,

rigid metallic tubes, either exteriorly or interiorly, or both, and the wi ing of such tubes exteriorly, or both exteriorly and interiorly, as they are forced forward from the bath.

No claim is made hereinafter to the mech-. "'anism for treating metal tubes or rods with liquid coatings, as the same constitutes the subject matter of an application filed by me in the U. S. Patent Oflice on the 25th day of March, 1909, bearing SerialNo. 485,735, and

of which the present application is a division. Having thus described my invention what I claim and desire to secure by Letters Patent of the United States is-- l 1. The described method of treatlng a tube or rod so as to give to the same .a smooth or polished exterior surface, consisting in first heating it, then subjecting it to a heated liq uid bath in the natureof a polishing agent. and finally wiping the same as it is withdrawn from the bath in heated condition.

use

2. The described method of treating a tube so as to give to the same a smooth or polished interior surface, consisting in first subjecting the tube to a heated liquid bath in the nature of a polishing agent, and then heating and: wiping the interior surface until the desired degree of smoothness is efiected.

3. The described-method of treat-in a tube so as to ive to the me a smooth or relatively frictioiiless interior, consisting in first heatit,1then subjecting it to a heated bath of a liquid surfacing agent, and finally wi ing the same interioriy as itis Withdrawn rom the bath.

3:. The described method of treating a tube so as to, give tov the exterior and interior surifaces thereof the desired qualities as to appearance and smoothness respectively, consistin in first subjecting the same to a heated liquid agent, then rubbing both surfaces as the tube is withdrawn from the bath."

5. The described method of. treating a tube so as to give tothe exterior and interior surfaces thereof the desired qualities as to appearance and smoothness respectively, consisting in first .heating the same," themsubjectingit to a bath of a heated liquid agent, then rubbing both surfaces as it is withdrawn from the bath and whilesubjected to further heat. f

6. The described method of giving to a metallic tube a-smooth interior surface, consistin in subjecting it to a bath of heated liqui coatin agent, then removing it from the bath, an finally wiping its interior surface while still in heated condition.

7. The described method of treating a tube so as to give to it a smooth protectin coating, conslsting in subjecting it to a fheated bath of a galvanizing agent, then automatically lifting and removing it.,from the bath, and finally wiping it both exteriorly and interiorly whileit 153 still in heated condition.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWIN T. 'GREENFIELI)..

Witnesses:

C. J. KINTNER, M. F. KEATING. 

